Induced pupillary hippus following near vision : increased occurrence in visual display unit workers

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      <subfield code="a">Induced pupillary hippus following near vision</subfield>
      <subfield code="b">: increased occurrence in visual display unit workers</subfield>
      <subfield code="c">Kazuhiko Ukai, Kunihiko Tsuchiya and Satoshi Ishikawa</subfield>
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      <subfield code="a">Tsuchiya et al. (1989) reported the use of a quasistatic method for examining changes in pupil accommodation following near vision. A certain number of normal subjects were found to show long-lasting pupil constriction followin the short but strong near vision. This pupil after-effect lasted in some cases for more than 15 min. Interindividual differences in this after-effect were large. The pupil after-effect was sometimes dissociated from the adaptation of tinic accommodation. This paper aims to report on a phenomenon revealed by further investigation using this method. This is that in a proportion of subjects, including a significantly large number of VDU (Visual Display Unit) workers, large and slow pupillary oscillation, so-called "hippus", was found to be evoked easily following near vision</subfield>
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      <subfield code="g">Vol. 40, nº 11, November 1997 ; p. 1201-1211</subfield>
      <subfield code="t">Ergonomics</subfield>
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